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[cc2541] Getting time in power saving mode

Hi champs, 

One of my customer wanted to get time to use "osal_GetSystemClock", but they couldn't. 

( They only needed how much second was gone like 3000s, 5000s.. didn't need time frame)

Here is the my customer's environment. 

1. SimpleBLEPeripheral project

2. Enable Power Saving 

So, I asked them to call "osalTimeUpdate( )" function before "osal_GetSystemClock()", but I just found one thing is our OSAL_API.pdf as below. 

You must enable the OSAL_CLOCK compiler flag to use this feature. In addition, this feature does not maintain time for sleeping devices.

So, here is my question. 

1. Sleep devices meant "Enable Power Saving mode", correct? 

2. In this case, how can they get some time in power saving mode?

Best Regards, 

Ronie Oh